EP2305532A1 - Procédé de synchronisation automatique de mesures de position de voie - Google Patents

Procédé de synchronisation automatique de mesures de position de voie Download PDF

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Publication number
EP2305532A1
EP2305532A1 EP20100011614 EP10011614A EP2305532A1 EP 2305532 A1 EP2305532 A1 EP 2305532A1 EP 20100011614 EP20100011614 EP 20100011614 EP 10011614 A EP10011614 A EP 10011614A EP 2305532 A1 EP2305532 A1 EP 2305532A1
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EP
European Patent Office
Prior art keywords
measurement
synchronized
sections
measurements
local
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20100011614
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German (de)
English (en)
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EP2305532B1 (fr
Inventor
Rong Le
Klaus-Ulrich Wolter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsche Bahn AG
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Deutsche Bahn AG
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Publication of EP2305532A1 publication Critical patent/EP2305532A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
    • B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
    • B61K9/08—Measuring installations for surveying permanent way
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
    • B61L23/04—Control, warning or like safety means along the route or between vehicles or trains for monitoring the mechanical state of the route
    • B61L23/042—Track changes detection
    • B61L23/047—Track or rail movements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
    • B61L25/02—Indicating or recording positions or identities of vehicles or trains
    • B61L25/026—Relative localisation, e.g. using odometer

Definitions

  • the invention relates to a method for automatically synchronizing track position measurements in railway traffic.
  • the railway infrastructure is the basis for a safe railway operation. To ensure the high degree of safety, extensive maintenance measures are necessary.
  • the inspection of the track geometry is of particular importance here. Often the inspection of the track position is carried out with special measuring vehicles. The results obtained are compared with limit values. From the comparison repair measures are derived and carried out.
  • the measurement results of the track position inspections are stored in databases. With special programs it is possible to display the measurement results of individual inspection trips. In this case, several results of different inspection trips of the same route section can be displayed at different inspection times. From this presentation, a person skilled in the art can follow the development of track deviations and plan and carry out medium and long-term maintenance measures.
  • the local increments are not always constant, so that additionally creates a distortion of the measurement. This local offset and the distortion arise because the distance measurement is usually done by means of wheel pulses. Due to wear-related decrease in the wheel diameter, slip during braking and acceleration as well as due to friction and weather conditions, these deviations can not be avoided.
  • the results of the inspections must be synchronized, so that changes and rates of change can be calculated.
  • the track position measurements are shifted locally to each other.
  • deviations in the sampling steps can not be ruled out, which is why the track position signals are additionally compressed or stretched relative to each other.
  • the measured values are available at different local points. This is particularly problematic since, during longer measuring runs, the offset as well as the distortion or compression / extension are not constant over the entire length of the measuring run. Thus, a manual, subsequent synchronization is not possible.
  • the results of the inspection trips can not be manually synchronized with each other.
  • sections statistical variables For the tracking of changes in the track situation is therefore often resorting to sections statistical variables and these are compared. For example, sections with a length of 250 m are used and the standard deviations are determined for the individual measuring channels - track position parameters. With this approach, the change in the track position quality can be assessed, the temporal change of individual defects - track position deviations - is not possible with this approach.
  • the EP 1 213 202 B2 describes a method for mapping the track condition via signals from various sensors attached to wheels and bogies, which are fed to an evaluation unit and transmitted to a control center, where they are assembled to form an image of the track condition. Again, there is no synchronization of the measured data.
  • the invention has for its object to synchronize the measurement results of inspection trips each other so that as a result synchronized measurement results are available that allow automatic evaluation and evaluation of the results. Furthermore, there is the possibility that medium and long-term maintenance measures can be derived automatically from the track position measurements and the temporal development of track-bearing faults.
  • the results of an inspection run are selected in the first step, which serve as a reference measurement. Since the location-dependent sampling steps .DELTA.x of an inspection measurement are not constant, the measured values for new locally equidistant x-coordinates are calculated. The new location coordinates (x-coordinates) are determined by recalculating the distance between the beginning and the end of the inspection journey - reference measurement - in such a way that equidistant x-coordinates are created. The associated measured values (y-coordinate) can be determined by means of interpolation calculation. Here, linear as well as non-linear interpolation methods can be used. This step is performed for all measurement channels of a measurement run. The locally processed measurement data of the inspection trip serve as a reference measurement. All further inspection runs are synchronized with this reference measurement.
  • the reference measurement and the measurements to be synchronized are subdivided into half-overlapping sections of, for example, 100 m in length. Depending on the application, other section lengths are conceivable.
  • the cross-correlation function ⁇ is calculated.
  • the location of the maximum of the calculated cross-correlation function ⁇ indicates the local displacement of the two sections y ri and y si to each other. This local displacement is determined for each overlapping section pair. From the local displacements of all sections y si to the respective section y ri of the reference measurement, the km offset is calculated by means of interpolation method. Since the mileage offset is generally not linear, it will be automatic as well as local displacement the distortion or strain and compression, which are non-linear over the entire measurement. The thus determined km offset is used for all measuring channels of the measurements to be synchronized.
  • the measuring points are calculated at the points of the reference measurement by means of interpolation methods.
  • interpolation methods linear as well as non-linear interpolation methods can be used.
  • the inspection measurement was synchronized with the reference measurement.
  • the individual measuring points are in relation to the x-coordinate,conffastyakgenau one above the other. An automatic evaluation and evaluation is now possible.
  • a local scan of 0.10 m is selected.
  • the used track system is in illustration 1 shown.
  • the synchronization takes place in such a way that any number of additional measuring channels can be synchronized. If the reference measurement has been prepared as described below, any number of inspection measurements can be taken with the reference measurement synchronize. To clarify the procedure, an inspection measurement is synchronized with the reference measurement in the application example.
  • the FIG. 2 shows a section with 100m track length.
  • the local shift of the measurement 1 with respect to the measurement 2 can be clearly seen. This is about 30 m.
  • an inspection measurement is prepared in such a way that the measured values can be assigned to defined distance kilometers and that a constant scanning step of, for example, 0.10 m results, other scanning steps are also possible.
  • This processing is done by evenly dividing the section between the first and the last measuring point in equidistant increments. Since the new location coordinates thus determined do not correspond to the original ones, the measured values must be calculated at the new location coordinates. This is done in the exemplary embodiment by means of interpolation with cubic splines. In general, linear interpolation methods can also be used. For all measuring channels of the reference measurement, the corresponding measured values are recalculated to the method described above.
  • the further inspection measurements are synchronized to the reference measurement. This is done in such a way that in each case one measurement channel from the reference measurement and the corresponding channel are selected from the inspection measurement to be synchronized.
  • the track width was selected because the track width changes much more slowly than, for example, the longitudinal heights or the deviations in direction compared to the other track position parameters.
  • the entire measurement is subdivided into sections of 100 m in length, whereby the individual sections overlap each half, ie 50 m. For each section, with the track of the reference measurement and the corresponding section of the inspection measurement to be synchronized, the cross-correlation function ⁇ is calculated and normalized.
  • FIG. 3 shows the cross-correlation function for a section.
  • the position of the maximum of the cross-correlation function indicates the displacement of the selected sections relative to each other.
  • the displacement is 29,6 m.
  • the mutual displacement is calculated in this way. From the shifts of all sections of the entire inspection journey, the offset of the kilometer is determined. Since the shift of the individual sections can be different, the kilometer correction is determined by means of nonlinear interpolation (spline interpolation). Since the displacement of the individual sections is different, the distortion or extension and compression of the signals is automatically determined in this way.
  • FIG. 4 shows the calculated kilometer offset
  • the kilometer offset thus determined is applied to all measuring channels, the measurement to be synchronized.
  • the measurement points of all measurement channels of the measurement to be synchronized are calculated at the mileage points of the reference measurement. This can be done with interpolation. In the application example, spline interpolation was used.
  • the result is synchronized measurements in which the sampling steps have been corrected and the measurement points of all measurement channels of all measurements are at the same km coordinates.
  • FIG. 5 shows the synchronized measurements

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
EP10011614.4A 2009-10-01 2010-09-29 Procédé de synchronisation automatique de mesures de position de voie Active EP2305532B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910043701 DE102009043701A1 (de) 2009-10-01 2009-10-01 Verfahren zur automatischen Synchronisierung von Gleislagemessungen

Publications (2)

Publication Number Publication Date
EP2305532A1 true EP2305532A1 (fr) 2011-04-06
EP2305532B1 EP2305532B1 (fr) 2017-08-30

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EP10011614.4A Active EP2305532B1 (fr) 2009-10-01 2010-09-29 Procédé de synchronisation automatique de mesures de position de voie

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EP (1) EP2305532B1 (fr)
DE (1) DE102009043701A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3126683A1 (fr) 2021-09-07 2023-03-10 Eramet Dispositif d’analyse ferroviaire
US20230406377A1 (en) * 2020-11-25 2023-12-21 Plasser & Theurer Export Von Bahnbaumaschinen Gesellschaft M.B.H. Method and system for determining correction values for correcting the position of a track

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025068979A1 (fr) * 2023-09-27 2025-04-03 Praedico, B.V. Création de point de référence de mesure de voie à partir de données de mesure de voie ferrée de réseau linéaire

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5579013A (en) 1994-05-05 1996-11-26 General Electric Company Mobile tracking unit capable of detecting defective conditions in railway vehicle wheels and railtracks
US6044698A (en) 1996-04-01 2000-04-04 Cairo Systems, Inc. Method and apparatus including accelerometer and tilt sensor for detecting railway anomalies
US20040204882A1 (en) * 2003-04-10 2004-10-14 Pedanekar Niranjan Ramesh Methods for aligning measured data taken from specific rail track sections of a railroad with the correct geographic location of the sections
EP1213202B1 (fr) 2000-12-07 2006-04-05 Siemens Schweiz AG Procédé pour représenter l'état de la voie et/ou les caractéristiques de fonctionnement mécaniques de véhicules sur rails
DE102006043043A1 (de) 2006-03-14 2007-09-20 Baldur Rögener Verfahren und Überwachungssystem zum Überwachen von Schienen-Fahrwegen
US20090070064A1 (en) 2007-09-07 2009-03-12 Board Of Regents Of University Of Nebraska Vertical track modulus trending

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5579013A (en) 1994-05-05 1996-11-26 General Electric Company Mobile tracking unit capable of detecting defective conditions in railway vehicle wheels and railtracks
US6044698A (en) 1996-04-01 2000-04-04 Cairo Systems, Inc. Method and apparatus including accelerometer and tilt sensor for detecting railway anomalies
EP1213202B1 (fr) 2000-12-07 2006-04-05 Siemens Schweiz AG Procédé pour représenter l'état de la voie et/ou les caractéristiques de fonctionnement mécaniques de véhicules sur rails
US20040204882A1 (en) * 2003-04-10 2004-10-14 Pedanekar Niranjan Ramesh Methods for aligning measured data taken from specific rail track sections of a railroad with the correct geographic location of the sections
DE102006043043A1 (de) 2006-03-14 2007-09-20 Baldur Rögener Verfahren und Überwachungssystem zum Überwachen von Schienen-Fahrwegen
US20090070064A1 (en) 2007-09-07 2009-03-12 Board Of Regents Of University Of Nebraska Vertical track modulus trending

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230406377A1 (en) * 2020-11-25 2023-12-21 Plasser & Theurer Export Von Bahnbaumaschinen Gesellschaft M.B.H. Method and system for determining correction values for correcting the position of a track
US12391293B2 (en) * 2020-11-25 2025-08-19 Plasser & Theurer Export Von Bahnbaumaschinen Gesellschaft M.B.H. Method and system for determining correction values for correcting the position of a track
FR3126683A1 (fr) 2021-09-07 2023-03-10 Eramet Dispositif d’analyse ferroviaire
WO2023037073A1 (fr) 2021-09-07 2023-03-16 Eramet Dispositif d'analyse ferroviaire

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Publication number Publication date
DE102009043701A1 (de) 2011-04-07
EP2305532B1 (fr) 2017-08-30

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